Guides
Wake windows by age
A wake window is how long a baby can stay comfortably awake between one sleep and the next. It stretches with age: what starts as thirty to sixty minutes in a newborn becomes several hours by the first birthday.
Agubu shows the next likely sleep from your baby's age and last wake-up.
On this page
It is not a rule. It is an observation — but one of the most useful ones you have at two in the morning when nothing seems to settle.
Why there is a window at all
Every minute awake builds sleep pressure. Once enough pressure has built up, a baby is ready to fall asleep.
If the window is too short, there is not enough pressure yet, and the baby lies awake after being put down. If it runs too long, the body starts working to stay awake, and settling gets harder. So both early and late can be difficult. The comfortable middle is wide — and it sits in a different place for every baby.
Rough ranges by age
These are broad figures that appear across common paediatric sleep guidance. If your baby was born early, use their corrected age.
- 0-1 month — usually 30 to 70 minutes
- 1-3 months — usually 45 minutes to 1.5 hours
- 3-6 months — usually 1.5 to 2.5 hours
- 6-10 months — usually 2 to 3.5 hours
- 10-18 months — usually 3 to 5 hours
- 18-24 months — usually 4 to 6 hours
The ranges are wide because babies genuinely differ that much. Where your baby falls is something you will find out from a few days of tracking, not from a chart. That is exactly what the sleep log in Agubu is for.
What tiredness looks like
Early signs are quiet and easy to miss:
- A glazed stare, focus drifting into the distance
- Yawning, rubbing eyes or ears
- Slower movement, losing interest in a toy
- Burying their face into your shoulder
Late signs are loud:
- Arms and legs thrown around stiffly
- Sudden crying that is hard to soothe
- Arching and stiffening when picked up
- Red-rimmed eyes and a furrowed brow
A baby who has reached the late signs usually takes longer to settle. That is not a failure. Almost every parent misses the early cues in the first weeks and learns to read them later.
How to use the window
Treat the window as an estimate, not an alarm. "It has been 45 minutes, I should put them down" works less well than "it has been 45 minutes, let me watch for the cues." When the clock and the baby disagree, the baby is right.
The window also shifts through the day: the first one after waking is usually the shortest, and the ones toward evening the longest. Illness, vaccination days, travel and unsettled stretches can all shorten it.
After a few days of tracking, your baby's own rhythm shows up and you stop needing the general ranges.
When to see a doctor
A wake window is a care tool, not a medical measurement. In these situations, look at your baby rather than the clock and speak to a clinician:
- Your baby is hard to rouse or unusually floppy and listless
- Breathing pauses, loud snoring or any blueness during sleep
- Fever, vomiting, a rash or other new symptoms
- A clear drop in feeding, or refusing to feed
- Sleep loss has worn you down — that is a valid reason to ask for help too
In an emergency, call your local emergency number.
Sources
This article draws on the general guidance of the organisations below. It contains no quoted text; the information was written in our own words.
- American Academy of Pediatrics (AAP) — infant sleep and safe sleep guidance
- NHS (United Kingdom) — Start4Life infant sleep information
- Turkish Ministry of Health — infant and child follow-up guidance
This article is general information, not medical advice. If your baby has a specific health condition, the instructions your clinician gave you apply.
